Re: [PATCH 5.4 39/84] driver core: Set deferred_probe_timeout to a longer default if CONFIG_MODULES is set

On Tue, Feb 27, 2024 at 5:27 AM Greg Kroah-Hartman
[off-list ref] wrote:

5.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: John Stultz <redacted>

[ Upstream commit e2cec7d6853712295cef5377762165a489b2957f ]

When using modules, its common for the modules not to be loaded
until quite late by userland. With the current code,
driver_deferred_probe_check_state() will stop returning
EPROBE_DEFER after late_initcall, which can cause module
dependency resolution to fail after that.

So allow a longer window of 30 seconds (picked somewhat
arbitrarily, but influenced by the similar regulator core
timeout value) in the case where modules are enabled.

Cc: linux-pm@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Walleij <redacted>
Cc: Thierry Reding <redacted>
Cc: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Bjorn Andersson <redacted>
Cc: Saravana Kannan <redacted>
Cc: Todd Kjos <redacted>
Cc: Len Brown <redacted>
Cc: Pavel Machek <redacted>
Cc: Ulf Hansson <redacted>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: "Rafael J. Wysocki" <redacted>
Cc: Rob Herring <robh@kernel.org>
Reviewed-by: Bjorn Andersson <redacted>
Reviewed-by: Rafael J. Wysocki <redacted>
Signed-off-by: John Stultz <redacted>
Link: https://lore.kernel.org/r/20200225050828.56458-3-john.stultz@linaro.org (local)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/base/dd.c | 9 +++++++++
 1 file changed, 9 insertions(+)

This change ended up being reverted upstream in ce68929f07de

Is there some specific reason it got selected to be pulled into -stable?

thanks
-john